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Black holes are not entirely black. Rather, they do in fact emit a stream of particles or radiation called Hawking Radiation.
To understand what Hawking Radiation is, you must first understand something about quantum physics. Empty space is not entirely empty. Rather, on the smallest scales, particles pop in and out of existence. These particles, called virtual particles, pop into existence as antiparticle pairs. One with a positive charge and the other with a negative charge. Normally these particles annihilate each other almost immediately. However, this is not always the case with a black hole.
The immense energy of a black hole creates antiparticle pairs just before the event horizon. The energy is so intense that some of of it is converted into matter via E=MC^2. The antiparticle pairs pop into existence, yet they do not annihilate each other. Rather, the immense gravity of the black hole pulls them apart. The negative particle falls inward while the positive particle escapes out into space. The stream of these particles is the Hawking Radiation.
Because the negative particle has fallen into the black hole, it's mass will begin to decrease. Over many billions or even trillions of years the black hole will evaporate away entirely.
Image credit: NASA/JPL-Caltech .
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Spiral Galaxy NGC 4038 in Collision
Explanation: This galaxy is having a bad millennium. In fact, the past 100 million years haven't been so good, and probably the next billion or so will be quite tumultuous. Visible on the upper left, NGC 4038 used to be a normal spiral galaxy, minding its own business, until NGC 4039, toward its right, crashed into it. The evolving wreckage, known famously as the Antennae, is pictured above. As gravity restructures each galaxy, clouds of gas slam into each other, bright blue knots of stars form, massive stars form and explode, and brown filaments of dust are strewn about. Eventually the two galaxies will converge into one larger spiral galaxy. Such collisions are not unusual, and even our own Milky Way Galaxy has undergone several in the past and is predicted to collide with our neighboring Andromeda Galaxy in a few billion years. The frames that compose this image were taken by the orbiting Hubble Space Telescope by professional astronomers to better understand galaxy collisions. These frames -- and many other deep space images from Hubble -- have since been made public, allowing an interested amateur to download and process them into this visually stunning composite.
Image Credit: Data Collection: Hubble Legacy Archive; Processing: Danny Lee Russell
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Yes... it’s Mars, taken under bad seeng unfortunately, however it’s only in black and white because I used a special filter called IR pass, for give to me more details , but here it hasn’t so much because bad turbolence 😭 hope you like same😊😍.
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🔭 Skywatcher mak 127/1500.
📸 CMOS ASI120MC planetary mono camera.

Part 3: What is Astrophysics?. Milestones in astrophysics
Because the only way we interact with distant objects is by observing the radiation they emit, much of astrophysics has to do with deducing theories that explain the mechanisms that produce this radiation, and provide ideas for how to extract the most information from it. The first ideas about the nature of stars emerged in the mid-19th century from the blossoming science of spectral analysis, which means observing the specific frequencies of light that particular substances absorb and emit when heated. Spectral analysis remains essential to the triumvirate of space sciences, both guiding and testing new theories.
Early spectroscopy provided the first evidence that stars contain substances also present on Earth. Spectroscopy revealed that some nebulae are purely gaseous, while some contain stars. This later helped cement the idea that some nebulae were not nebulae at all — they were other galaxies!
In the early 1920s, Cecilia Payne discovered, using spectroscopy, that stars are predominantly hydrogen (at least until their old age). The spectra of stars also allowed astrophysicists to determine the speed at which they move toward or away from Earth. Just like the sound a vehicle emits is different moving toward us or away from us, because of the Doppler shift, the spectra of stars will change in the same way. In the 1930s, by combining the Doppler shift and Einstein’s theory of general relativity, Edwin Hubble provided solid evidence that the universe is expanding. This is also predicted by Einstein’s theory, and together form the basis of the Big Bang Theory.
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Penumbral Lunar Eclipse.
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Does this Moon look a little different to you? Although shown in spectacular detail, the full face of Earth's most familiar satellite appears slightly darker than usual, in particular on the upper left, because it is undergoing a penumbral lunar eclipse. The image was captured in Hong Kong, China, on September 16 when the Moon crossed through part of Earth's shadow -- but not the darkest where the Earth shades the entire Sun. A lunar eclipse can only occur during a full moon, and many know this particular full moon as the Harvest moon for its proximity to northern harvests. The next full moon will occur this coming Sunday. Some cultures refer to it as a Leaf Falling Moon, named for its proximity to northern autumn. The second full moon of the same month ("moonth") is sometimes called a Blue moon; meanwhile, this month features a rare second new moon, an event known to some as a Black moon.
Image Credit & Copyright: Robin Lee
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